PHP bind_param转换混淆

Question

我正在做一个登录表单，我很困惑如何使用绑定参数来选择数据。

我当前的代码如下所示：

$stmt = $mysqli_conn->query('SELECT * FROM user WHERE email = ? AND password = ?'); 
    $stmt->bind_param('ss', $emailclean, $passwordclean); 

    $stmt->execute(); 

    $result = $stmt->get_result(); 
    if ($row = $result->fetch_assoc()) { 
     $finalmessager['success'] = 'You are logged in'; 
     $_SESSION['finalmessagelog']= $finalmessager; 
     $_SESSION['authenticateduser']= $emailclean; 
     header('location:../index.php'); 
     unset($_SESSION['logErrors']); 
    } 

我不明白为什么这不工作

Answer 1

我让你一个小例子：

<?php 
$query = "SELECT * FROM user WHERE email = ? AND password = ?"; 
$stmt = $this->db->prepare($query); 
$stmt ->bind_param("ss", $emailclean, $passwordclean); //both are strings 
$stmt->execute(); 
$stmt->store_result(); 
$stmt->bind_result($column1, $column2); //you have to assign every column 

    while($stmt->fetch()) 
{ 
    if($column1 == 1){ //first column is id? just guessing 
     echo "its the id 1 yeah!"; 
    } 
    echo "col1: $column1, col2: $column2 \n"; 
} 

$stmt->close();